OLAS/vendor/dompdf/dompdf/lib/php-font-lib/classes/Table/Type/hhea.php

<?php
/**
 * @package php-font-lib
 * @link    https://github.com/PhenX/php-font-lib
 * @author  Fabien Ménager <fabien.menager@gmail.com>
 * @license http://www.gnu.org/copyleft/lesser.html GNU Lesser General Public License
 */

namespace FontLib\Table\Type;
use FontLib\Table\Table;

/**
 * `hhea` font table.
 *
 * @package php-font-lib
 */
class hhea extends Table {
  protected $def = array(
    "version"             => self::Fixed,
    "ascent"              => self::FWord,
    "descent"             => self::FWord,
    "lineGap"             => self::FWord,
    "advanceWidthMax"     => self::uFWord,
    "minLeftSideBearing"  => self::FWord,
    "minRightSideBearing" => self::FWord,
    "xMaxExtent"          => self::FWord,
    "caretSlopeRise"      => self::int16,
    "caretSlopeRun"       => self::int16,
    "caretOffset"         => self::FWord,
    self::int16,
    self::int16,
    self::int16,
    self::int16,
    "metricDataFormat"    => self::int16,
    "numOfLongHorMetrics" => self::uint16,
  );

  function _encode() {
    $font                              = $this->getFont();
    $this->data["numOfLongHorMetrics"] = count($font->getSubset());

    return parent::_encode();
  }
}